Compare 1801 vs 1806
| Property | 1801 | 1806 |
|---|---|---|
| Type | prime | composite number |
| Unique factors | 1 | 4 |
| Total factors | 1 | 4 |
| Prime factorization | 18011 | 21 × 31 × 71 × 431 |
| Prime factorization | 1801 | 2 × 3 × 7 × 43 |
| Divisors count | 2 | 16 |
| Divisors | 1, 1801 | 1, 2, 3, 6, 7, 14, 21, 42, 43, 86, 129, 258, 301, 602, 903, 1806 |
| Number of properties | 7 | 0 |
| Chen primes | 174th | |
| Cuban primes 1 | 13th | |
| Harmonic primes | 99th | |
| Isolated primes | 168th | |
| Lucky primes | 66th | |
| Primes | 279th | |
| Pythagorean primes | 136th | |
| Roman numberals | MDCCCI | MDCCCVI |
| Base 2 | 111000010012 | 111000011102 |
| Base 3 | 21102013 | 21102203 |
| Base 4 | 1300214 | 1300324 |
| Base 5 | 242015 | 242115 |
| Base 6 | 122016 | 122106 |
| Base 7 | 51527 | 51607 |
| Base 8 | 34118 | 34168 |
| Base 9 | 24219 | 24269 |
| Base 10 | 180110 | 180610 |
| Base 11 | 139811 | 13a211 |
| Base 12 | 106112 | 106612 |
| Base 13 | a8713 | a8c13 |
| Base 14 | 92914 | 93014 |
| Base 15 | 80115 | 80615 |
| Base 16 | 70916 | 70e16 |